init: Write registers in arch_init instead of map_tables

boot/+aarch64: Apply R_AARCH64_RELATIVE relocations

This fixes string literals after harec@219d934 (generate string constants using
gen_data_item)

boot/+aarch64: Set base address to 0

boot/+aarch64: Include .dynamic and .rel.reloc in PE data

+aarch64: Fix build issues

But the bootloader does not work anymore, it seems.

all: fix compiler issues on newer harec

objects::lookup_types: fix syntax

arch+x86_64: save all registers on syscall

So that the context makes sense if the syscall faults, for instance.

all: updates for module3

x86_64: implement arch-specific faults

all: s/noreturn/never/g

Flesh out capability IPC fault handling

objects::endpoint: refactor captransfer

This re-arranges the code to handle error conditions better and to
scaffold out locations where errors will be returned to userspace
(either via sysret or a fault) when the remaining infrastructure is in
place to do so.

uapi: log error details on cap fault

objects: move ncap check to captransfer

uapi: add errno to cap faults

all: void => opaque

uapi/fault: dump state when no handler registered

uapi: refactor faults, add cap faults

uapi: add refcount syscall